Printing-telegraph.



G. L. KRUM. PRINTING TELEGRAPH.

APPLICATION FILED SEPT. a, 1906.

11 00433 Patented Sept. 26, 1911.

3 BHEETE-SHBET 1.

C. L. KRUM.

PRINTING TELEGRAPH.

APPLIGATIOK mum 811M. 6, 1906.

1,00%,038. Patented Sept. 26, 1911.

I a snnsTHannB'r a.

. C. L. KRUM.

PRINTING TELEGRAPH.

APPLIOATION mum SEPT. a, 1900.

. 004.038. Patented Sept. 26, 1911.

3 SHEETS-4111721 3.

UNITED STATES PATENT OFFICE. 1

CHARLES L. KRUM, OF CHICAGO, ILLINOIS, ASSIGNOR TO MORKRUM COMPANY, OF

CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

PRINTING-TELEGRAPH.

Specification of Letters Patent.

I Application filed September 6, 1906. Serial No. 333,452.

' able element also controlled by the selecting apparatus and by whichthe number of possible selections is greatly increased with- V I outcomplicatingthe arrangement of magnets in the circuits of the selectivesystem.

The. invention consists in the combinations and arrangements of partsand circuits hereinafter set forth, illustrated inthe accompanyingdrawings and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a diagram of the arrangement of parts andcircuits in accordance with the present invention. Fig. 2 is a diagramof a, modified arrangement.

- Fig. 3 is a diagrammatic representation of ductors. Means controlledby the separate the shifter mechanism employed in connection with theselective system illustrated in Fig. 1. Fig.4 is a diagrammatic View ofa modified form of shifter mechanism.

The operating circuits for the printing devices preferably comprise aset ,of main conductors and separate sets of branch conbranchcond'uctors'o'perate the-printing devices. In the'arrangement'shown in,vFig. 1., each signal ismade by a combination of three line impulses andfouroperatingcir,

cuits are employedand comprise the set of four main conductors 1 and 1and the sepa- Y rate sets of branchlcond and is arranged to selectivelycontrol the flow of Suitablemeans'controlledby the line circuit currentto the main and branch conductors.

In .the form shown a series of'four line relays5 are interposed in theline circuit 6 leadingfrom a distant station-and extending .in',.seriesthrough the several-relays- 5,

4 then by a conductor to .the ground or to a "(suitable return wire. Therelays are arranged to.r'espond differently to the modlfied codeimpulsestransmitted over the line.

relays and with a branch wire 7 through the coils 9 of the third andfourth relays. I r l A weak positive line impulse flowing. through thecoils 8 ofthe relays will non-- tralize thecu'rrent in the coils9 of thefirst relay so that the armature of the first relay, willbe drawnagainst its back' contact. It:

For example, the first relay-may respond to Patented Sept. 26,1911.

a weak positive impulse, the"second to. a

weak negative impulse and the third and positive and negative imfourthtostrong pulses respectively. The relays niay'be ar ranged to variablyrespond in this mannerin a number of different ways. i --In the-formshown each relay 5 is provided with {.two. coils 8 and 9. The linecircuit extends through the coil 8 of the. first andthird relays in'onedirection and through the coils 8 of the second and fourth relaysi'nthe-opposite direction. A conductor 10 leads from the local battery 11and is p'rovidedwith a branch 12 extending in opposite-directionsthrough the coils 9 of the first 'and"second 13 extending relays. Thecoils 9 are also connected to a return wire 14 leading back tothebatte'ry -11. The local circuit from battery 11 is always closedthrough the coils 9 of therelays 5 so that the armatxireslfi of" therelaysare normally held up against their front contacts. resistance 16is interposed in, the branch Wire 12 so that the 'cur-rent"flow- 'ingthrough the coils 9 of the first and sec;

ond relays is weaker than that flowing through the coils 9 of the thirdandfourth Will'not be sufficient to neutralize the coil 9 ofthe. thirdrelay and .it will merely serve to strengthen the effect of the coils 9,of the second and fourth relays. A weaknegative impulse willneutralizethe current in the ,coil,9 in thesecond relay but will beinsufliicient to-neutralize the current'iii coil 9 of,

the fourth relay and will. merely serve to 'EStrengtli'en the ettect' ofthe coils 9 the? first and third relays. In a similar manner a strongline impulse, either positive '01" negative "will neutralize the effect,of coil 9 in either of the third or; fourth relays but, will e'ntirelyover balance the current in' thefcoils'9' of the first and secondrelays. I The relay armatures 15 are connected to battery :wire 10 byconductors 17 fand' the-main" con-- ductors 1 and 1 of the operatingcircuitsare connected to the .back contacts of'the'line relays 5. .Inthe manner described, the

varied impulses imparted through the line circuit selectively controlthe flow of current from the local battery 11 to the set of mainconductors 1 and 1 Otherl means controlled by the line circuit could beemployed, if desired, for selectively connecting the set of mainconductors to the battery.

The main conductors'l are connected to the shifting contacts 18 of atransfer switch 19 and extensions of the main conductors 1 are connectedto the back contacts 20 thereof so that the circuit through the mainconductors 1 is. normally broken at this point. The branch conductors 2are connected to the front contacts 21 and are thus normally connectedwith the main circuit conductors 1. At the operation of the transferswitch v19 the connection between the first set of branch conductors 2and the nets 25 and 26. Each of these magnets is provided with two coils27 and 28 which are wound in the same direction. The coils 27 areincluded one in each of thebranch conductors 2. A common return wire 29leads from the coils 27 to one of the opposed coils in the transferswitch relay 23. The

other opposed coil of the switch relay 23 is connected by a conductor.30 to the coils 28 of the selecting magnets 25 and 26. Magnet 25 isarranged to operate a series of normally open switches 3-1and a lockingswitch 32. Magnet 26 is, arranged to operate a series of normally. openswitches 33 and a locking switch 34. The locking switches 32 and 34 areincluded in a locking circuit comprising a conductor 35 leading from thebattery wire 10 and the branches36 leading from the contacts of thelocking switches 32 and 34 through the coils 28 of the respecbination ofthree line impulses.

art

.to the operated tive ma ets'25 and 26.

As stated, eachsignal comprises a com- At' the first line impulse, whichis either a strong positive or 'a strong negative, the armature ofeither the third or fourth relay 5, will be I operated and theoperatingcircuit may then be traced'from battery 11 by wires 10 and 17armature 15, thence by one of 'themain conductors 1 to the correspondingshif ting contact 18 of the transfer switch and thence by one of thebranch conductors 2 through the coil27 of either the selecting magnet 25or the selecting magnet26. From coils are connected by a con vductors 1normally disconnectedtherefrom. The first -line impulse, as stated,serves to shift the either of' these magnets the current passes by wire29 through one of the coils of the transfer switch relay 23 and by wires24 and 14 back to battery 11. This energizes either the magnet 25 or themagnet 26 and shifts one of the two sets of switches 31 and 33 intoengagement with their contacts; It also closes either one of the lockingswitches 32 or 34 so that a current may be traced from battery 11 bywires 10 and 35 to eitherone of the locking switches and by wire 36through the coil 28 of the operated selecting-magnet and by wire 30through the opposite coil of the switch relay, thence back as before bywires 24 and 14 to the battery.

The selecting magnets 25 and 26 operate 5 if more quickly opposed coilscan operate. through both'coils, the transfer switch re: mains in normalposition, but at the'cessation of the line impulse the armature of theselected line relay 5 is restored to its normal position and .thecircuit throughthe selected main conductors 1 and corresponding branchthan the transfer switch relay. 23, so that the circuit through both ofthe i of the relay is closed before it. As long as the current flowsconductor 2 and through one of the opposed I coils of the relay 23, isbroken. The operation however of either of the selecting mag nets 25 or26 operate to close thelocking circuit through its coil 28 and throughthe other coil of the relay 23, and the circuit 1 thus established isheld in closed condition,

so that the transfer switch relay23'is then operated to disengage theswitches 18 from the circuits 21 and shift them into engagement with thecontacts 20. The first line impulse thus serves to select one of thefirst sets of the branch conductors 2 and its corresponding selectingmagnet and locking cir-v cuit which, when selected, is held in closedcondition. At the cessation of the first line impulse, the transferswitch operates to disconnect the first set of branch conductors 2 fromthe main conductors '1. The transferswitch, when'once operated is ofcourse held in shifted position by the locking. circuit which iscontrolled by the switches 32 and 34 and which extends through one ofit's coils.

The set of main conductors I extend from the transfer switch 19 to twoof the-"shifting switches 37 of the second transfer switch 38. The mainconductors 1* extend directly to the other two shifting switches 37'.The second set of branch conductors 3 are connected to the backcontactsofthe switches 37 and th third set of branch conductors4 are connectedto the front contacts of these switches so that at this point theconductors 3.are normally connected to the main conand 1 and thebranches 4 are connection of the main conductors 1 from serves to shiftthe connection of the main conductors 1 and 1} from the set of branchconductors 3 to the set of branch conductors 4. The transfer switchrelay 40, like relay 23 is provided with two oppositely wound coils orcoil sections which are connected on one side to the battery return wire14 by a conductor 41'.- The second set of branch conductors 3 is dividedinto two sets of subbranches 42 and 43. The sub-branches 42 are arrangedto be connected to the branches 3 by the switch contacts 31 and thesubbranches 43 are connected thereto by the switch contacts 33. Thearrangement is such that each of the branch conductors 3 may beconnected to one of the sub-branches, either in the set 42 or the set43. The sub-branches 42 and 43 lead respectively to the coils 44 of aset of selecting magnets 45 and from these coils a common return wire 46leads to one of the-coils of the transfer switch relay 40. Magnets 45are also provided with coilsv 47 wound in the same direction as coils 44and the coils 47 are connected by a common'con duct-or 48 to theopposite coil of the transfer switch relay 40. Each of the selectingmagnets 45 is arranged to operate a set of normally open switches 49 anda normally open locking switch 50. Switches 50 control a locking circuitextending from. battery by thewires 35 and 51 and including a series ofbranches 52 leading from the contacts of the locking switches to thecoils 47 of the 4 respective magnets 45.

The first line' impulse of the signal, in the manner described, servesto shift either the set of switches 31 or the set of switches 33 toclosed position and to lock them in such closed position. It also, asstated, serves to shift the connection of the main conductors 1 from thebranch conductors 2 to the second set of branch conductors 3. At thesecond -'line impulse, the currentmay be traced from battery 11 by wires10 and 17 to the armature 15 of one of the line relays 5 (operatedinaccordance' with the character ofthe line impulse) thence by one ofthe main conductors 1 or 1. to one of the switches 37,

theme ,by one of the branch conductors 3 to one of the switches eitherin the set 31 or the i i set 33, since one or the other of these setshave been previously shifted to closed position by the first lineimpulseof the code signal or. combination. Thence, the circuit may betraced by one of the sub-branches 42 or 43 through the coil 44 0f one ofthe selecting magnets 45 and by conductor 46 to oneof thecoils ofthetransfer switch relay 40 and thence by""wires 41 and 14 back to battery11; One of the sets of switches 49 and one of the locking switches50,will then be moved to closed position andthe locking.

switches. 49 in closed opposed cojls or sections of the relay before itis energized to operate its armature, and as long as the second lineimpulse persists the switch members 37 of the transfer switch remain innormal position. At the cessation.

of the second line impulse however, the armature of the selected linerelay 5 returns to normal position and the circuit through the coil 44of the selected magnet 47 and through one of the coils of the switchrelay 40 is broken, but the locking circuit through the coil 47 of theselecting magnet 45 and through the outer coil of the relay 40 remainsunbroken so that the transfer switch is then operated to shift theconnection of the main conductors 1. and 1 from the second set ofbranchconductors 3 to' the third set of branch conductors 4. Theswitches 49 and 50 of' the selected magnet 45 and the switches 37 of thetransfer switch 40 are of course held in shifted position by the lockingcircuitafter the cessation of the second line impulses.

The third set of branch conductors lead through the coils of a series oflocking magnets 53, each of which is arranged to operate a lockingswitch 54 that is connected by a conductor 55 to the coil of thecorresponding magnet. The contacts of these switches are connected tobattery by the wires 35, 51 and branch wires 56. Beyond the lockinmagnets the branch conductors 4 are ivided into sets of sub-branches 57.There are four sub-branches in each set and eight sets as shown, andeach set of sub-branches 57 is arranged to be connected to thebranch'conductors 4 by one of the switches 49 which are operated asdescribed by the selecting magnets 45. The arrangement is such that oneof the branch conductors 4 ma be connected to one of the sub-branches 5in each of the several sets. ,The operatin magnets 58 are arranged insets of four as s own,.and

the sets of sub-branches 57." These magnets are connected to battery bya common return wire 59.-

the coils of these magnets are interposed in "The second impulse of anygiven signalserves to'shift and. lock one of the sets'of.

osition ancl also-to operate relay 40 to shithe' main conductors fromthe second set of the connections of branches to 'the third set ofbranches, 4.

At the third and final line impulse of: any given signal one of the'linerelays 5 is operated and current may be traced from battery the mainconductors 1 or 1 to the switch members 37 of the transfer relay 40 andby one of the branch conductors 4 through the coil of one of the lockingmagnets 53 and to one of the switches 49in the previously shifted set,and thence by one of the sub- J tery.

operating magnets may type-bar 60,as indicated in Fig. 2,

' is energized fit is branches 57. through one of the operating magnets58 and back by wire 59 to the batenergized and the locking circuit maybetraced from-b'attery by wires 10, 35, 51 and 56 to the switch 54 of theselected locking magnet and by wire 55 through the coil of the selectedlocking magnet, and thence as before by one of the branches 4 throughone of the switches 49 and the selected operating magnet 58 to thebattery return wire '59, so that the circuit is closed and held closedthrough the selected operating magnet 58 independently of the continued.operation of the selected line relay.

The operating magnets 58 are used to control the operation of anysuitable form of printing apparatus." Certain of'the operating magnetscan be used to control the line space feed and carriage return mechanismof the printing apparatus, while the greater part of the operatingmagnets will each be arranged to effect the printingof the letter orcharacter corresponding to its particular signal or code combination ofimpulses. By employing certain of the operating magnets asshiftingmagnets, each one of the type printing two or more characters. The typeoperating magnets 58- may each operate a or each type operating magnetmay be-usedto 0on trol the movement of the typewheel .61, as indicatedin Fig. 4.' In the arrangement indicated in Fig. 2, the spring-heldarmature 62 of each type operating magnet is con-' nected bya link 63 tothe pivoted type-bar so that when the magnet isenergized the type-barwill be shifted to strike uponthe paper carried by a platen 64. In theform shown inFig'. 4 tyne wheel 61-is mounted upon a shaft65 and thearmature 66 of the type-operating magnet 58. is arranged to shift one ofa number of stop devices 67 which cooperate with a wheel 68 on thesha-ft 65 to arrest the movement of the type wheel. Other well knownmeans could be employed by which the operation of the et would bring theproper type on the wheel 61 to the printing point.

7 Whenever one of the operating -magnets arranged to open the lookingcircuit through the selecting magnets 25, 26' and 45. For this purpose,the normally closed switch 69 3s interposed in the conductor 35 ofj thelocking circuit from the One of the locking magnets 53 is thus beemployed for battery 11 and suitable means-are provided for opening theswitch when any one of the type-operating magnets is energized. Forexample, as indicated in Fig. 2, each ,one of the type-bars 60' may bearranged to strike.

the switch 69 to open the locking circuit so that the magnets 25, 26 and45 will be deenergized and all parts returned to normal position inreadiness to receive the next succeeding signal.

Two of the operating magnets 58 and 58" (see Fig. 1) are arranged tooperate suitable shift mechanism which may be employed either forshifting the platen .or for shifting the type wheel. In the form-shownin Fig. 3 the platen 64 is journaled in a suitable frame 7 0 having arib 71 on its under side which extends between upwardly projecting lugs72 on the inwardly bent ends of a pair Qfshift .levers 73. The ends'72of the shift levers 73 are engagedby the heads of a-pair of plungers 74which extend through fixed abutments 75 and are provided on their outerends with adjusting and locking nuts 76'. Spring 7 7 coiled about theplunger 74 extends between the heads thereof and fixed abutments 75. Bythe arrangement described, the -shifters and their platen are normallyspring-held in central position.

One of the shifters 73 is operated by the magnet 58 to move the platenin one direction while the other shifter is operated by the magnet .58to move the platen in the opposite direction.

- A pair of spring-held pawls 78 cotiperate with lugs 79 on therespective shifters 23 so that when either one of the shifters is op-.

erated the adjacent pawl '78 will engage the lug 7 9 thereon and lock itin shifted positiom The pawls 78 are connected by links 80 to a pivotedlever 81 which is actuated by another one of the operating. magnets 58-'to move the spring-heldpawls and release the shift mechanism Asindicated inFigs. 1 and a; the shifter magnet-s '58 and 58 are providedwith :1

arate return conductor 82 which extends leads to the common return wire59 back to battery, so thatwhenever'either of the shifting magnets isselected the magnet 83- will also be energized and. its armature 84operated to close a normally open switch 85. The switch 85 is connectedto the battery wire 35 of the locking circuit and its contact isconnected to a conductor 86 which extends through the coil of a magnet87 and back to the return wires 82 and 59, so that the operation ofmagnet 83 and switch 85 will energize the magnet 87. The armature 88- ofthis magnet is arranged to operate another normally closed, unlockingswitch 89 int-he conductor 35 of the locking circuit. The armature lever81 of the releas- 1' i ,mgmechamsm may also be employed for ing magnet58 (see Fig. 3) is also arranged toyopen a normally closed unlockingswitch 90 interposed in the conductor 35.

lVhere the shifter mechanism is arranged to move theplaten, each of thetype bars 00,

- as indicated in F i 2 will be provided with three" type 91, any one ofwhich may be "brought to the printing point by the comb-ined operationof the magnets 58*, 58" and the'other operating magnets 58. Theshiftmo'ving a; type wheel, as indicated in Fig. 4. lfn'this formthe'lugs 72 on the shifters 73 ngageithe end of a bell crank lever 92,the other arm-of which shifts the type wheel 61 longitudinally uponfitheshaft 65 to bring any onejoffthelrows' oftype 93 thereon oppositetheprintingf-point. The specific construction' of shift mechanism setforth may be .W idelywaried without departure from theessentialslofflthe invention. The most frequentlyused 'characters, thatis to-"say the small letters will require no preliminary operationofthe' shift mechanism, since at least twenty-seven of the {thirty-twooperating magnets controlled by the improved selective system, may beemployedfor operating the type mechanism.

' Bymeansof the double shift the total numeigh't-y'-one.v When acapital, figure or punc- .ber :of -cha racterswhich .may be selected istirationmark'is to be printed at the distant station, the proper signalor code combina- .,jtion'fis'transmittecl over the line to select 3magnet583f'so that the shifter mechanism wil-lfbe moved and locked inone or the other ofits abnormal positions. At the same time ;-'e itherthe-operating magnet 58 or operating magnetsj83 and 87 will be energizedto open t e switch 89 in the locking circuit and the selecting-switchesare returned to normalin readiness to receive the succeeding signalwhich selects one of the type operating mag- 1 nets. When it is desiredto restore the 45. shifter mechanism the code signalnecessary to selectthe operating magnet 58 1s transmitted over the line and the lever 81 isshifted to release the locking pawl 78 and permit the return of theshifter mechanism 59 the same ,time switch 90 is shifted by the arbymeans of the springs 77 to normal. At

mature lever 81 to open the locking circuit. Preferably, the transmitterwill be provided with special shift keys which, when depressed, willeffect the transmission of the proper code combinations to select theshifter magnets 58 and '58 respectively, and ea shift key will bearranged, when re- 1 sed, to-transmit a releasing signal or codecombination which will select the releasing magnet 58. -In this way theshift keys of the transmitter may be used exactly as are the shift keysof, an ordinary typewriter. That is to say, either one may be depressedto effect the movement of the shifting mechpressed shift key is releasedhowever, the

shifter mechanism at the receiving station will be automaticallyrestored to normal, as in the ordinary typewriter, and the operator neednot actuate a special releasing key.

In the modified arrangement of the selecting apparatus shown in Fig. 2,theshift mechanism is not actuated by one of the opcrating magnets 58but means are provided whereby the first impulse of certain codecombinations is arranged to actuate the shift mechanism. In thismodification, the arrangement of the line relays 5, the selectingmagnets 25, 26 and 4:5 and the locking magnet 53 and operating magnets58 is the same as thatshown in Fig. 1 and the transfer switches 19 and38 are arranged to control the connections of the branch conductors- 2,3 and'4 to the set of conductors 1 and 1.v The conductors 1 and 1 arenot however connected directly to the'back contacts of the line relaysbut on the other handare connected to the front contacts 94 of anadditional transfer switch 95.- A set of main conductors 96-96 areconnected to the back contacts of the armatures-15 of the line relays 5and to the movable switch contacts 97- which are operated by thearmature 98 of the transfer switch relay 99. An additional set of branchconductors 100 and 100 are connected to the normally engaged contacts ofswitches 97 so that the main conductors 96-96 are normally connected tothe branches 100-and 100. Each of the branch conductors. 100, isarranged to control a magnet 101 and a magnet 102. Each of these magnetsis provided with two coils and the corresponding branch conductor-100extends through one coil in .each magnet .and both branches 100 areconnected by a common return wire 103 to one of the opposed coils 104.-of the transfer switch relay 99. Both opposed coils 104: and 105 oftrans fer switch relay 99 are connected by a common conductor 106 to thebattery return conductors 21 and 14. The coil 105 of the transfer switchrelay is connected by a conductor 107 to the other, coils of the magnets101 and 102 and these coils are connztcted byconductors 108 with thenormally open, switches 109 that are cont-rolled respectively by themagnets 101. The contacts of these switches are connected to the batterywire of the locking circuit by a common 'con ductor 110. In a similarmanner each of the branch conductors 100 extend through one of the coilsof one of the magnets' 111 and thence back by the conductors 112 andcommon conductor 103; to the coil 104 of the transferswitch relay.Conductors 113 extend from the switches 114 of the magnets flll" throughthe other coil of the rereturn wire spective magnets and back by thecommon the transfer'switch relay. The contacts of the switches'114 areconnected to the battery wire 35 and 110-of the' 'locking c rcult. Themagnets 111 also'operate additional switches 115 which are connectedrespe r;

tively by conductors 119-to' the back con- 'tacts of a pairof-additional switches 120 operated by the armature 98 of the transferswitch relay 99. Thecont-acts of the switches 115 are connected to thebattery wires 110 and 35 of the locking circuit and the addi-.

tional switches 120 of the itransfer switch relay 99 are connectedrespectlvely by to operate switches 122 that areconnected respectivelyby conductors 123 to the coils of a pair of magnets124-which operate theshift mechanism. This shift mechanism in the form shown is similar'tothatset forth in Fig. 3 except that no means are provided for lockingthe shift mechanism in its changed position. Other, forms of shiftmechanism may be provided if desired but it is unnecessary with thisarrangement to provide lockingmeans therefor. Thev contacts of theswitches 122 are-connected by a conductor 125 to the battery'wires 35and 110 of the lockingicircuit and the shifter gnets 124' are connected.by a conductor 126 to the battery return wire 14.

-.With the arrangement shown in Fig, 2,- the most frequentlyusedcharacters (that is' the small letters) are selected by codecombinations or signals of three im ulses each when the capitals andfigures an other less frequently used characters are, selected by -codecombinations of four impulses each. If-

a character is transmitted that necessitates the preliminary operationof the shift mechanism, the first line impulse will be of such a natureto select either the third or fourth line I relay 5. That isto say, withthe arrangement shown, the'first line impulse of the signal will beeither a. strongv negative or a strong positive, so that either one ofthe main conductors 96 will be selected and the circuit traced'from"battery 11 by wires ,10 to the armature 15 of either the third orfourth relay, thence by one of the conductors 96 and one of the switches97 to either one of the branch conductors 100*, and by the sslectedbranch conductor through either one of the set of magnets 101 and 102 toconductor 103, through the coil 104 of the transfer switch relay 99 andback to battery by wires 106, 24 and 14. In this way one of the switches109 and one of the switches 122 will be shifted to closed positions andthe locking circuit wi be closed from battery 11 by conductors 35 and110 to the shifted switch 109 through the other coils of the selectedmagnets 101 and 102, by conductor 107 to the other coil 105 107' to theopposite coil 105 off condiictors 121 with the conductors 1. Thearmatures of the magnets 102 are arranged of the relay 99 and back asbefore by conductors 106, 24 and 14 to battery. The magnets 101 operatemore quickly than the transferswitch relay '99 so that the battery and.locking circuit are closed through the closed from battery by conductors35, 110

and 125 to the selected switch 122, thence by one of the conductors 123to one of the shifter operating magnets 124 and back to batteryby-conductors .126 and 14 so that the shift mechanism is movedfromnormal'to one or the other of its changed positions, and

it is, held .in this changed position since the locking circuit isclosed through one or the other of the shifter operating magnets 124.

It will be understood that the coils in the magnets 101,102 and 111 arewound in the same direction so that the flow therethrough of both thebattery and locking circuits does not interfere with their operation.The

'flow of the current however, through the opposed coils 104 and 105 ofthe switch relay. 99 so that its armature rema1ns 1n normal positio-n'so long as the first line impulse of the signal persists. Atthe sametime one. of the switches 122 is shifted to closed pos tion as stated,and the locking circuit is opposed coils104 and of the'switch relayprevents its operation until the cessation of the first line impulsewhen the circuit through the. coil 104 of the switch relay will jbebroken bythe return of the armature 15 of the selected line relay tonormal.

The locking'circuit however is closed through the coil 105 of the switchrelay and is held closed so that the armature 98 of the switch relay isoperated toshift the switches 97 into engagement with the contacts 94.The connection between the main conductors 96 is thus changed from thebranches 100 and.l00 to the set of conductors 1 and 1 lifter this 7first shifting impulse therefore, the conductors 1 and 1*. are connecteddirectly to thenormally disengaged contacts of the line relays.Thesucceeding three impulses of the signal will then act, aspreviouslydescribed in. connection with the arrangement shown in Fig. 1, to selectone of the actuating magnets 58.

ductors 100,'thence through one coil of one I of the magnets 111, byconductor 112 a-ii'd 103 to the coil 104 of the transfer switch relayand to. the battery return conductors 13 106, 24 and 14. One of themagnets 111 is thus energized to shift one of the switches 114 and oneof the switches 115. The circuit is thus closed from battery by wires 35and 110 to the selected switch 114, to the other coil of the,corresponding magnet 111, by wire 113 and by conductor 107 through theopposed coil 105 of the transfer switch relay and back as before byconductors 106, 24 and 19 14 to battery. The magnets .111 operate morequickly than the transfer switch relay so that the circuit is closedthrough both of the coils 104 and 105 of the relay before it canoperate, and its armature is thus held in 15 normal posit-ion as long asthe first line impulse persists. A circuit is also closed from battery11 by wires 35 and 110, selected switch 115 to one of the conductors119, thence by one of the switches 120 to one of the conductors 121and'to either one of the conductors 1, thence by one of the branch'conductors 2 to the coil 27 of one of the selecting magnets or 26 andback by the common conductor 29 to one of the opposed 25 coils of thetransfer switch relay 23 and back to battery by the conductors 24 and14.

, Either magnet 25 or 26 will-thus be operated to shift either the setof switches 31 and I 32 or the set of switches 33 and 34 to closed 39position.

By the operation of either the magnet 25 or 26 the locking circuit isclosed from the battery wire 35 to either the switch 32-or 34, thence byeither one of the conductors 36 to the coil 38 of the selected magnet 35and by the wire 30 to the opposite coil of the transferswitch relay 23and back as before to'the battery by wires 24 and 14. The operation ofeither the first or second relay by a 'the* first line impulse of thesignal thus C serves'toenergize either the selecting magnet 25 or theselecting magnet 26 and to close the locking circuit therthrough so thatthe 'set of switches operated. by either one of these magnets is closedand held in closed .45 position. The first line impulse also acts toclose the battery circuit through the opposed coils, both vof thetransfer switch relay 99 and the transfer switch relay 23 and thearmatures of these relays remain in normal I position as'long asthefirst line impulse persists. At the cessation of the first line impulsehowever, the circuit through the coil 104 of the relay 99 is broken bythereturn of the selected relay armature to normal so that the armature98 operates to move the switches 97 into engagement with the contacts 94and change the connection of the main conductors 96 and 96* from the setof branches 100 and 100 to the set of conductors 1 and 1. At the sametime, switches 120 are shifted out of engagement with their contacts sothat the circuit through one of the coils of the transfer. switch relay23 is opened while the locking circuit through the 05 other coil remainsclosed so that the arma- 3 are then in connection with the set of mainconductors 96 and 96 and 1 and 1*, so that the second line impulse willact, as in the manner previously described, to select one of the magnets45 and close the locking cir- I cuit therethrough. At the cessation ofthe second line impulse as previously described, the transfer switchrelay 40 operates to disconnect the branches 3 and connect the branches4 to the line relays so that the third line impulse will select one ofthe g locking magnets 53 and one of the operating magnets 58, in themanner previously described.

A normally closed unlocking switch in the conductor 35 of the lockingcircuit is ar- 5 ranged to be opened when any one of the operatingmagnets 58 is energized. Any suitable arrangement of unlocking switch orswitches may be employed. In the form shown, each operatinn magnet 58 isarranged to shift the type-bar 60 which in turn is arranged to open theunlocking switch 69 so that all parts may return to normal position iiireadiness to receive the next succeeding signal. 5

The conductors 96 leadin from the first and second line relays may beconnected directly to the conductors 1 if desired, thus dispensing withthe use of the magnets 111 and switches 120. Other changes may be 100made without departure from the essentials of the invention.

It will be noted that a set of conductors are employed leading from theline relays and any one of these conductors may be connected to batteryby a characteristicsline impulse. Several sets of branch conductors are.employed, the first set being normally connected to the set of mainconductors leaning from the selecting relays, so that the first lineimpulse will serve to close the circuit through one of the first set ofbranches and operate the selecting magnet therein. At the cessation ofthe first line impulse the first set of branches are entirelydisconnected from the set of main conductors and the second set ofbranches are connected thereto so that the second line impulse willclose the circuit through one of the second sets of branches and operatethe selecting magnet therein and close the locking circuit therethrough.Similarly, at the cessation of the second line impulse the transferswitch relay operates to disconnect the second set of branches andconnect the third set thereto so that the final selection may beproperly effected by closing the circuit through one of the third setsof branches. '1

By employing the transfer switch mechanism which successively connectsand discon- 130 nects the several sets-of branches from the set of mainconductors leading from the line relavs, impulses of like character may,if desired, followone another inthe same signal or code combination.- Inthis way the 'number of possible selections is increased over. similarselecting systems, or with the same number of selections the arrangementof circuits is simplified and the number of operating magnets required.is considerably 'reduced.

Having described my invention, what I claim as new and desire to secureby Letters Patent, is

1. Inprinting telegraphs, the combination with the set of mainconductors and thesets of branch conductors as described, transferswitches for successively connecting said sets of'branch conductors tosaid set of'main conductors, signal operating magnets in the last set ofbranch conductors, switch operating magnets in each of the other'sets ofbranch conductors and switch contacts in each set controlled bythemagnets in the preceding set, substantially as described.

2. In printing telegraphs, the combination with the set of mainconductors and the sets of branch conductors as described, transferswitches automatically actingat the cessation of the impulse or changein the condition of the turrent to successively connect said sets ofsaid branch conductors to said .set of .main conductors, signaloperating magnets in the last set of the series, switch operatingmagnets in each of the other sets of branches and switch contacts ineach set controlled by the magnets of the preceding sets, substantiallyas described.

3. In printing telegraphs, the combination with the set-of mainconductors and the sets Qf branch conductors as' described, transferswitches controlledby the flow of current through said conductors andautomatically acting at the cessation of the impulse therethrough orchange of current therein to suecessively connect said sets of branchconductors to said set of main conductors, signal operating magnets inthe last.set1of the se-- rie's,-switch operating magnets in each of theother sets of branches and switchcontacts in each set controlled by themagnets in the preceding set, substantially as described.

. 4. In printingtelegraphs, the combination with the set of mainconductors and the separate sets of branch conductors as described,transfer switches for successively connecting said sets of branchconductors to said set off main conductors, operating relays for saidtransfer switches havlng opposed coils -in-' cluded in saidconductorsand automatically actuating said transfer switches at the ce's-f sationof the impulses through said conductors, signal operating magnets in thelast set of branch conductors,switch operating mag nets in each of theother sets of branches and switch contacts in each setcontrolled by theI magnets in the preceding set, substantially as described. 5. Inprinting telegraphs, the combination with the set of main conductors,the sets of branch coniluctors and means for selectively controlling theflow of curre'nt therethrough, of-signal operating magnets in the lastset of branch conductors,switch operat1ngmagnets in each of the othersets of branches and switch. contacts in each set controlled by the.magnets-of the preceding set, substantially as described. r

6. In printing telegraphs, the combination with the set of mainconductors and the sets of branch conductors as described, of a linecircuit, means operated thereby for selectively controlling the flow ofcurrent through said main and branch conductors, signal opcratingmagnets in the last set of branch conductors, switch operating magnetsin each of the other sets of branches and switch con-. tacts in each setcontrolled by the magnets in the preceding set, substantially as de--scribed.

- I 7 In printing telegraphs, the combination with the setof mainconductors and separate sets of branch conductors, of a line circuit,relays operated thereby for selectively ,controllingthe flow of currentthrough said .main conductors, transfer switches automatically actuatedby the flow of current through the main and branch conductors forsuccessively connecting said sets of branch conductors to said sets ofmain conductors, No signal operating magnets in the last set of branchconductors, switch-operating mag nets in each of the other sets ofbranches and switch contacts in each setcontrolled by the magnets in thepreceding setsub-m stantially as described.

branch conductors, signal operating mag nets in the last set of theseries, switchop crating magnets in each of the other so of branches,switch contacts in each set con trolled by the magnets in the precedingse and a locking switch controlled by each ofsaid magnets formaintaining its circuit in? closed condition independently of saidmain'f gf'o conductors, substantially as described.

' 9. In printin telegraphs, the combination l with theset -o local-mainconductors .and= the separate sets of local branch conductors asdescribed, of'a line circuit, means actuated 12B thereby for selectivelycontrolling the flow of current through the local main and branchconductors, signal operating magnets in the last set of the series,switch op- 1 crating magnets in each of the other sets of 136;

branches, switchcontacts in each set controlled by the magnets in thepreceding set, a locking switch controlled by each of said magnets formaintaining its circuit in closed condition independentlyof the flow ofcurrent through'said main conductors and a set of locking'magnets in thelast set of branch conductors for maintaining the flow of currenttherethrough independently of said main conductors, substantially asdescribed.

10. Inprinting telegraphs, the combination with the set of local mainconductors and the separate sets of local branch onductors as described,of a line circuit, means actuated thereby for selectively controllingthe flow of current through said local main and branch conductors,signal operating magnets in the last set of the series, switch operatingmagnets in each of the other sets of branches, switch contacts ineach'set controlled by the magnets in the preceding set, a lockingswitch controlled by each of said magnets and a set of locking magnetsin the last set of branch conductors for maintaining the flow of currentindependently of said main conductors and means controlled b each ofsaid si nal 0 eratin ma 3 b b nets for opening the circuit of saidswitchoperating magnets and of said locking mag- .nets, substantially asdescribed.

11. In printing telegraphs, the combination-with the set of mainconductors and the three sets of branch conductors, of transfer switchmechanism for successively connecting said sets of branch conductors tosaid sets of main conductors, signal operating magnets in the third setof branch cenductors, switch operating magnets in the first and secondsets of branch conductors and switch contacts in each set controlled bythe magnets in the preceding set, substantially as described.

12. In printing telegraphs, the combination with the set of lo'calmain'conductors and the three sets of local branch conductors, of a linecircuit, means operated thereby for selectively controllingthe flow ofcurrent.

throughsaid local main and branch conductors, signal operating magnetsin the third set of branch conductors, switch operating magnets in thefirst and secondsets of branch conductors and switch contacts in eachset controlled by the magnets in the preceding set, substantially asdescribed.

13. In printing telegraphs, the combina tion with the set of local mainconductors and the three setsof local branch conductors, of. linecircuit, means operated thereby for selectively controlling the flow ofcurrent through said main conductors, transfer switch mechanismautomatically controlled by the flow of current through sald local mainand branch conductors for successively connecting said sets of branchconductors to said sets of main conductors, signal operating magnets inthe third set of the series,

tion with the setof local main conductors and the three sets of localbranch comluctors, of a line circuit, means operated thereby forselectively controlling the flow of current through said main and branchconductors, signal operating magnets in the third set of branchconductors, switch operating mags nets in the first and second sets ofbranch conductors, switch contacts in the second and third setscontrolled respectively by the magnets in the first and second sets anda locking switch controlled by each of'said magnets for maintaining theflow of current. therethrough independently of saidmain conductors,substantially as described.

In printing telegraphs, the combination with the set of local mainconductors and the three sets of local branch conductors, of a linecircuit, means operated there by for selectively controlling the flow ofa locking switch controlled by each of said magnets for maintaining theflow of current therethrough independently of said main conductors, alocking magnet in each branch conductor of the third set for'maintainingthe flow ct current theret-hrough independently of said main conductorsand means controlled by each oi. said signal operating magnets foropening the circuit through said branch conductors. substantially -.asdescribed.

16. In printing vtelegraphs, the combination with the set of mainconductors aifd the separate sets of branch conductors, of transferswitch mechanism for automatically and successively connecting said setsof branch conductors to said set of mainconductors, type controllingmagnets in the last set of branch conductors, magnets in the other setsof branch conduetm's, controlling switch contacts in the succeedingbranches and printing mechanism including a shiftable element operatedby certain of sald magnets, substantially as described.

17. In a printing telegraph, the combination with the set of mainconductors and separate sets-of branch conductors, of transfer switchmechanism controlled by the flow of current through said conductors forautomatically and successively connecting said iio in the succeedingsets said locking circuit,

separate sets of branch conductors to said set of main conductors, aline circuit, means operated thereby for selectively controlling saidmain and branch conductors, type operating magnets in the last set ofbranch con ductors, selecting magnets in the other sets of branches eachcontrolling switch contacts and, printing mechanism' including ashiftable element actuated by certain of said magnets, substantially asdescribed.

18. In printing telegraphs, the combination with the setof mainconductors and separate sets of branch conductors, of means selectivelycontrolling the flow of'eurrent through said conductors, type operatingmagnets in the-lastset of branch conductors,

selecting magnets in the other sets of branch conductors eachcont-rolling switch contacts in the succeeding sets, a locking circuitcontrolled by said magnets, printing mechanism including a shiftableelement controlled. by

- the last set of branch conductors, selecting magnets in the other setscontrolling the flow of current through said type operating magnets,printing mechanism including a shiftable element controlled by certainof said magnets, a lockingcircuit controlled by each of said selectingmagnets for maintaining the flow of current independent of said mainconductors and means operated by said type operating magnets for openingsaid locking circuit substantially as described.

2().- In printing telegraphs, thecombination with the set of mainconductors, separate sets of branch conthictors and means forselectively controlling the flow. of current therethrough, of typeoperating magnets in the last set of branch conductors, selectingmagnets in the other sets controlling the flow of current througlrsaidtype operating magnets, printing mechanism including a movable elementspring-held in central'position, shifter mechanism controlled by certainof-said magnets for moving said element in opposite direction fromnormal, a

locking circuit controlled by said selecting magnets and meanscontrolled by said type operating magnets for opening said lockingcircuit, substantially as described.

21. In printing t-elegraphs, the combinat1on w1th the set of mainconductors, separate sets of branch conductors and means for selectivelycontrolling the flow of current therethrough, of type operating magnetsin magnets in the other the last v set of branch conductors, selectingmagnets in the other sets controlling the flow of current throughsaid'type operating magnets, printing mechanism including a movableelement, shifters operated by cer tain of said operating magnets formoving said element to different positions from normal, means forlocking said element in any one of its shifted positions and devicescontrolled by certain other of-said operating magnets for releasingsaidlocking means, substantially as described.

22. In printing telegraphs, the combination with the set of mainconductors, separate sets of branch conductors andmeans for selectivelycontrolling the flow of current therethrough, of type operating magnetsin the lastset of branch conductors, selecting sets controlling theflow-of current through said type operating magnets, printing mechanismincluding a shiftable element spring-held in central position, shiftermechanism controlled by certain of said operating magnets for movingsaid element in opposite direction from normal, means for lockingshifted position, means operated by certain other of said operatingmagnets for releasing said locking means, a locking circuit controlledby said selecting-magnets and means operated by said type operating, andsaid locking releasing magnets for opening said locking circuit,substantially as described.

23. In printing telegraphs, the combination with a selective apparatusacting in response to the varied code combinations or signals, ofshifter mechanism movable to different positions from normal and actingin response to special signals or code combinations, means forautomatically locking said mechanism in any one of its shifted positionsand means acting in response to another special signal for releasingsaid locking means, substantially as described.

'24. In printing telegraphs, the combination with the selectivelycontrolled printing devices acting in response to the varied codecombinations or signals, of shifter mechanism cooperating with saidprinting devices, said shifter mechanism being yieldingly spring-held incentral in opposite direction from normal, 'means acting in response tospecial signals or code combinations for operating -said mechanism,means for automaticall locking said mechanism in either of its shitedposi tions and means acting in response to another special signal forreleasing said locking means, substantially as described.

25. In printing telegraphs, the combination with the set of mainconductors and the three sets of branch conductors, means forselectively controlling the flow of current through said conductors,switch mechanism said element in shifter position and movable forsuccessively connecting said sets of branch conductors to said set ofmain conductors, operating magnets in the last set of branch conductors,selecting magnets in the other sets of branch conductors controlling theflow of current'through said operating magnets, printing devicescontrolled by certain of said operating magnets and a sh-iftable elementcooperating with said printing devices and controlled by certain otherof said operating .magnets, substantially as described.

26. In printing telegraphs, the combination with the set of mamconductors and the three sets of branch conductors, means forselectively controlling the flow of current through said conductors,switch mechanism for successively connecting said sets of branchconductors to said set of main conductors, operating magnets in the lastset of branch conductors, selecting magnets in the other sets of branchconductors controlling the flow of current through said operatingmagnets, printing devices controlled by certain of said operatingmagnets, a shiftable I elementcoiiperating with said printing devicesand means controlled by two of said operating magnets for moving saidshiftable element to different positions from normal, substantially asdescribed.

- 27. In printing telegraphs, the combination with the set of mainconductors and the three sets of branch conductors a lin'e'cin cuit,means controlled by said line circuit for selectively controlling theflow of current through said conductors, switch mechanism forsuccessively connecting said sets of branch conductors to said set ofmain conductors, operating. magnets in the last set of branchconductors, selecting magnets in the other sets. of branch conductorscontrolling the fiow of current through said operating magnets, printingdevices controlled by certain of said operating magnets, a sl'iiftableelement cooperating with said printing devices and controlled by certainother of said operating magnets, means for operating said element inshifted position and means controlled by another of said operatingmagnets for releasing said lock. substantially as described.

28. In printing telegraphs, the combination with the set of mainconductors and the three sets of branch conductors, a line circuit,means controlled by said line ci1:-

cuit for selectively controlling the'flow of current through saidconductors, switch mechamsm for successively connecting said .sets ofbranch conductors to said set of main conductors, operating magnets inthe last set of branch conductors, selecting magnets in the other setsof branch conductors controlling the tlow of current through said 'ne'tsfor releasing said operating magnets, printing devices controlled bycertain of said'operating magnets, a shiftable element cooperating withsaid printing devices and controlled by certain other of said operatingmagnets, a locking circuit controlled by said and means controlled byeach of said operating magnets for opening said locking circuit,substantially as described.

29. In printing telegraphs, the combination with the set of mamconductors and the three sets of branch conductors, a line circuit,means controlled by said line circuit for selectively'controlling theflow of current through said conductors, switch mechanism forsuccessively connecting said sets of branch conductors tovsaid set ofmain conductors, operating magnets in the last set of branch conductors,selecting magnets in the other sets of branch conductors controlling theflow. of current through said operating magnets, printing devicescontrolled by certain of said operating magnets, a shiftable elementcooperating with said printing devices and controlled by certain of saidoperating magnets, means for automatically locking said element inshifted position, means controlled by another of said operating magnetsfor releasing said look, a locking circuit controlled by said select-ingmagnets and means controlled by each of said operating magnets foropening said locking circuit, substantially as described.

30. In printing telegraphs, the combination with the set of mainconductors and the three sets of branch conductors, a line circuit,means controlled by said line circuit for selectively controlling theflow of current through said conductors, switch mechanism forsuccessively connecting said sets of branch conductors to said set ofmain conductors, operating magnets in the last set of branch conductors,selecting magnets in the other sets of branch conductors controllingtheflow of current through'said operating magnets, printing devicescontrolled by certain of said operating magnets, a shiftable elementcooperating with said printing devices and spring-held in centralposition, said element being movable in opposite direction from normalby two of said operating magnets, means for automatically locking saidelement in shifted position, means actuated-by another of said operatingmaglock, :1 locking circuit controlled by said selecting magnets andmeans controlled by each of said operating magnets for opening saidlocking circuit, substantially as described.

CHARLES L. KRUM.

lVitnesses LILLIAN PRENTICE, Karin-1mm: Gunmen.

Copies 01' this patent may be obtained for five cents each, byaddressing the Commissioner of Pater Washington, D. C.

selecting magnets-

